Hoist



Oct. 18, 1938. w. E. VOLLMER HOIST Filed Sept. 20, 1937 WEI Elmer Ev%ya/JW%.

ATTORNEYS Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE HOISTWilliam Earl Vollmer, Reading, Pa.

Application September 20, 1937, Serial No. 164,789

1 Claim. (Cl. 254186) My invention relates to new and novel improvementsin hoists.

One of the principal objects of my invention is to provide a hoist whichis simple in construction, efficient in operation, durable in use andwhich lends itself to many uses.

Other objects and advantages will be apparent from the followingdescription, appended claim and annexed drawing.

Referring to the drawing wherein like reference characters designatelike parts throughout the several views:

Fig. 1 is a top plan view of my invention.

Fig. 2 is a side elevation thereof illustrating the same connected to adifferential chain pulley.

Fig. 3 is a sectional view taken on a line 3-3 of Figure 1.

In practicing my invention I employ a base comprising spaced angle irons5 connected together at the ends thereof by strap irons 6. Mounted abovesaid base at one end thereof is an electric motor I having a drive shaft8 connected to a similar shaft 9 journaled in a housing Ill. The shafts8 and 9 are connected together by a suitable coupling l I and the motoris secured above the base by a frame l2 connected to the angle irons 5.

The housing comprises upper and lower connected sections, the uppersection having the shaft 9 journaled therein while the lower section issecured between the angle irons or frame members 5 by means of suitablebolts [3. A transversely extending shaft I4 is mounted in the housing l0subjacent the shaft 9 having ends extending without said housing onwhich is mounted a niggerhead l5 and a chain pulley I6 respectively. Aworm I1 is secured on the shaft 9 for driving engagement with a wormgear l8 secured on the shaft I4 and a suitable lubricant is maintainedwithin the housing to lubricate said worm, said gear and the bearings inwhich the shafts are journaled. The ends of the angle irons adjacent theframe l2 have pivoted therebetween a handle l9 while the opposite endshave mounted thereon a pair of bearing brackets 20 in which is journaleda shaft 2| having an idler chain pulley 22 secured thereto, the shaft 2|between the bearing brackets 20 serving as a handle 23.

As illustrated in Figure 2 of the drawing the chain pulley is connectedto an endless chain 24 forming part of a differential chain hoist 25.The differential chain hoist comprises a double sheave pivoted to aconnecting hook 26 and having two chain grooves differing slightly indiameter, the endless chain 24 passes over these 5 grooves and around aSingle pulley 21 to which is attached a lifting hook 28. The endlesschain also passes around the idler chain pulley 22 secured to the base.

Mounted on the motor is a junction box 29 10 having an operating switch30 for effecting operation of the motor.

When the motor is operated shaft 9, which is connected to said motor,drives the transversely extending shaft 14 through the medium of the 15worm I1 and gear l8, said shaft l4 operating the niggerhead and chainpulley.

From the foregoing it will be apparent that I have provided a devicewhich is extremely simple in construction, compact in arrangement ofparts 20 and that the same may be readily moved and adjusted to variouslocations, the handles l9 and 23 being employed for lifting the same.

What I claim is:

A hoist comprising a base having a pair of 25 spaced longitudinallyextending connected angle irons, a motor secured above one end of saidbase and having a drive shaft, a housing having upper and lower sectionsand extending above said base at the opposite end thereof, a trans- 30versely extending shaft journaled in said housing and having a chainpulley fixed thereon laterally of said base, a longitudinally extendingshaft journaled in the upper section of said housing and effecting adrive connection be- 35 tween said drive shaft and said transverselyextending shaft, said angle irons straddling the lower section of saidhousing and connected with the latter for maintaining said housing infixed and spaced relation relative to said motor, 4 and a handleconnected to said irons at the ends thereof adjacent said housing forlifting the hoist as a unit, said handle having a shaft constituting thegrip portion thereof and said shaft having an end extending laterally ofthe base 45 and equipped with a chain pulley in working alignment withsaid first mentioned pulley for work association therewith uponoperation of said motor.

WILLIAM EARL VOLLMER.

